JPS6412330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power train standby device for a chassis dynamo that measures the actual running performance of a power train system unit, such as starting performance and acceleration performance, using a chassis dynamometer.

(Prior Art) Conventionally, as a device for measuring actual driving performance using a chassis dynamometer, the devices described in, for example, Japanese Utility Model Application Publication No. 54-134401 and Japanese Patent Publication No. 57-19619 are known. .

(Problem to be Solved by the Invention) However, in the case of such conventional devices, since the actual vehicle itself is installed on the chassis dynamometer roller to measure the actual running performance, the following will be explained. There are issues as listed below.

When multiple power units are installed on the same actual vehicle, and when obtaining measurement data for each power unit installed, after measuring with a certain power unit installed, remove the entire vehicle from the chassis dynamometer roller and place it in a vehicle maintenance pit, etc. The engine and transmission had to be replaced, and then the vehicle had to be moved onto the chassis dynamometer roller again to perform fixing work and load addition work, which reduced the number of man-hours required for power unit replacement and standby work. requires a large amount of man-hours.

Since this is a device that performs measurements using an actual vehicle,
The entire device occupies a large space surrounded by the vehicle body, and requires a large floor area with length and width that are at least equal to the overall length and width of the vehicle.

(Means for solving the problems) The present invention solves the above problems,
That is, the purpose of this invention was to significantly shorten the number of power unit replacements and standby man-hours, and to reduce the required floor space. A power unit stand that supports the vehicle and is removably attached to the floor; a tire stand that applies a considerable load and rotatably supports the drive wheel; a chassis dynamometer roller that the drive wheel is placed on and whose shaft is provided with a chassis dynamo that measures actual driving performance; This means is characterized by having the following.

(Function) When measuring the actual driving performance of a vehicle equipped with a specified power unit, the power unit stand supporting the power unit to be measured is fixed to the floor, and the actual vehicle is mounted on the drive wheels using a tire stand. Actual running performance can be measured without using it.

If it becomes necessary to replace the power unit with another one, the measurement operation can be promptly resumed by replacing the separately prepared power unit stand with the power unit stand that is already on standby. I can do it.

In addition, when it becomes necessary to replace part of the power unit, unlike pit work on an actual vehicle, we can replace the engine, transmission, etc. exposed from the power unit stand on the spot and in a position that is most efficient for work. can be quickly replaced.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In describing this embodiment, a power train standby device for a chassis dynamo of a front-engine front-wheel drive vehicle will be taken as an example.

FIGS. 1, 2, and 3 show an embodiment of the apparatus, and its configuration will be explained with reference to the drawings. 5 is a power unit stand, and this power unit stand 5 is equipped with an engine 6 and a transmission. The so-called power unit, such as the shock absorber 7, clutch mechanism, and accelerator mechanism, is mounted on the vibration-proof support 8, just like in a real vehicle.
The power unit stand 5 itself is fixed to the floor 4 by a stand fixing member 9.

Further, 10 is a tire stand, and this tire stand 10 includes a stand support 10a fixed to the floor 4 by a stand fixing member 11, and a stand arm 10b supported movably up and down by the stand support 10a and a pin 10e. It is composed of a tire device spring 10c interposed between the stand arm 10b and the stand column 10a, rotatably supports the drive shaft 12 at the tip of the stand arm 10b, and is provided on the drive shaft 12. driven wheel 1
3, so that a load equivalent to the weight of the vehicle can be applied by the restoring spring force of the tire mounting spring 10c.

Further, the chassis dynamo device includes the driving wheel 1
3 and 13 are disposed on a roller shaft 14, and one end of the roller shaft 14 is connected to a dynamo (not shown). The upper ends of the dynamo rollers 2, 2 are approximately at the same height as the floor 4, and the roller shaft 14 is supported by bearings 15, 15.

Next, the effect will be explained.

When measuring actual driving performance such as starting performance and acceleration performance of each constituent unit of the power train system using the embodiment device, the engine is mounted on the power unit stand 5 as shown in FIGS. 1, 2, and 3. 6 and transmission 7, etc., and drive wheels 13,
By applying a load equivalent to the vehicle weight to 13 and starting the engine 6, actual running performance can be measured without using an actual vehicle.

If it becomes necessary to replace the engine 6 or transmission 7 with another one during measurement, for example, when testing a different type of engine or transmission, or when trouble occurs with the engine 6, etc. In this case, the measurement operation can be promptly restarted by replacing the separately prepared power unit stand with the power unit stand 5 that is already on standby.

Furthermore, even when replacing only the engine 6 or transmission 7, there is no need for pit work like loading and unloading on an actual vehicle, and the engine 6 or transmission 7 exposed from the power unit stand 5 can be replaced on the spot. In addition, it can be replaced quickly and in a posture with good work efficiency.

As explained above, the power train standby device for a chassis dynamo according to the embodiment provides the following effects.

When measuring the actual running performance of a vehicle, the device does not use an actual vehicle, but uses a power unit stand 5 that supports the power unit and a tire stand 10 that applies a load equivalent to the vehicle weight to the drive wheels 13, 13. , standby and replacement operations can be performed quickly and easily.

Because it uses the powertrain system component of a front-wheel drive vehicle with no propeller shaft, the engine is located in front of the engine and does not occupy the large space surrounded by the vehicle body, unlike when the vehicle is on standby. , the required floor space can be significantly reduced.

In addition, even when using the powertrain system component unit of a rear-wheel drive vehicle, the large space surrounded by the vehicle body is not occupied, and the floor space is reduced considering only the dimensions of the powertrain unit arrangement. In general, the required floor space can be reduced when compared to an actual vehicle.

Although the embodiment has been described above based on the drawings, the specific configuration is not limited to this embodiment.

For example, in the embodiment, a spring is used to apply a load equivalent to the weight of the vehicle, but the means is not limited to the spring, and for example, a hydraulic cylinder or the like may be used.

(Effects of the Invention) As explained above, the power train standby device for a chassis dynamo of the present invention supports a power unit having an engine and a transmission, and is provided to be detachably attached to the floor. a power unit stand provided on the floor separately from the power unit stand;
and applying a load equivalent to the weight of a vehicle to a drive wheel connected to a drive shaft from the transmission, and placing the drive wheel in contact with a tire stand that rotatably supports the drive wheel;
The shaft is equipped with a chassis dynamometer roller equipped with a chassis dynamo for measuring the actual running performance, so when measuring the actual running performance of the vehicle, it is possible to measure the actual running performance of the vehicle without using the actual vehicle. As a result, standby and replacement operations can be performed quickly and easily, and the space occupied and floor space required can be reduced compared to when an actual vehicle is placed on standby.

[Brief explanation of drawings]

FIG. 1 is a front view showing a power train standby device for a chassis dynamo according to an embodiment of the present invention, FIG. 2 is a plan view showing a power train standby device for a chassis dynamo according to an embodiment, and FIG. 3 is a front view showing a power train standby device for a chassis dynamo according to an embodiment. FIG. 2 is a side view showing the tire stand of the device. 2... Chassis dynamometer roller, 5... Power unit stand, 6... Engine, 7... Transmission, 9... Stand fixing member, 10...
...Tire stand, 12...Driveshaft,
13... Drive wheel.

Claims (1)

[Scope of Claims] 1. A power unit stand that supports a power unit having an engine and a transmission and is removably installed on the floor; A power unit stand that is installed on the floor separately from the power unit stand, and , a tire stand that applies a load equivalent to the weight of a vehicle to a drive wheel connected to a drive shaft from the transmission and rotatably supports the drive wheel; A power train standby device for a chassis dynamo, comprising: a chassis dynamo roller equipped with a chassis dynamo for measuring actual running performance;